Hanoi weather in May
May in Hanoi: sweltering, soaked, with poor air quality — a fair time to visit.
#8 of 12 months in Hanoi · #571 of 604 destinations to visit in May · comfort 54/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Hanoi climate normals — May
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 38°C / 100°F | |
| Rainfall | 206 mm / 8.1 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 13.1 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 113 | 😷 poor |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hanoi in May — FAQ
- Is May a good time to visit Hanoi?
- May in Hanoi: sweltering, soaked, with poor air quality — a fair time to visit. It ranks #8 of 12 months for Hanoi on SeasonMap's comfort score (54/100).
- What is the weather like in Hanoi in May?
- In May, Hanoi averages a daily high of 31.5°C and a low of 24.8°C, with about 205.5 mm of rain over roughly 15.6 rainy days.
- What is the air quality in Hanoi in May?
- Hanoi has a mean US Air Quality Index of about 113 in May.